CADENCE DESIGN SYSTEMS INC — Director's Dealing 2010

Feb 9, 2010

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: CADENCE DESIGN SYSTEMS INC (CDNS)
CIK: 0000813672
Period of Report: 2009-07-31

Reporting Person: TAN LIP BU (N/A)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2009-07-31	Common Stock	Z	1939	—	Acquired	54153	Indirect
2009-07-31	Common Stock	Z	1939	—	Disposed	448534	Direct
2009-08-05	Common Stock	Z	18084	—	Acquired	72237	Indirect
2009-08-05	Common Stock	Z	18084	—	Disposed	430450	Direct
2010-01-08	Common Stock	Z	38784	—	Acquired	111021	Indirect
2010-01-08	Common Stock	Z	38784	—	Disposed	391666	Direct
2010-02-05	Common Stock	Z	17774	—	Acquired	128795	Indirect
2010-02-05	Common Stock	F	15560	$5.73	Disposed	376106	Direct
2010-02-05	Common Stock	Z	17774	—	Disposed	358332	Direct
2010-02-08	Common Stock	A	100000	—	Acquired	458332	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2010-02-08	Non-Qualified Stock Option (right to buy)	$5.6	A	800000	Acquired	2017-02-08	Common Stock (800000)	Direct

Holdings (Non-Derivative)

Security	Shares	Ownership
Common Stock	128795	Indirect

Footnotes

F1: Amount of Shares Beneficially Owned Following Reported Transactiion includes 1,214 shares of common stock acquired by the reporting person through the Cadence Design Systems, Inc. Employee Stock Purchase Plan on January 29, 2010.

F2: Shares withheld to satisfy tax obligations arising out of vesting of restricted stock.

F3: Grant of performance based incentive stock.

F4: Option vests at a rate of 1/48th per month.